The Wright Cyclone Engine -- Four Wright Cyclone engines power the Qantas Constellation. The Wright Cyclone (Model 749 U 18 BDI) has a maximum power of 2,500 h.p. It is an air-cooled, 18-cylinder, twin-row, radial engine largest and most powerful ever to be used by an Australian airline. Built to function satisfactorily at 35,000 ft., the Wright Cyclone features Scintilla low-tension ignition, Bendix-Stromberg fuel injection, two-speed supercharger and torque meter. Maximum overall length is 78